I haven't used it much on that body, but have seen it (clearly) indoors when windows/bare lights are involved. Mostly I shoot 2-camera: landscapes with my 14-45 on the OMD and the 7-14 on the GH2. This eliminates the purple blobs, but more importantly it opens up framing options significantly since UWA benefit the most from a multi-aspect ratio sensor (4:3, 3:2, and 16:9 switching on the fly without losing AOV makes the visualization process much more interactive). It flares a lot on the GH2 (any UWA with a bulbous front element will), however the impact on images is minimal. If I were just using it on the OMD, it would be a tough call. The 9-18 is cheaper, smaller, and can be stitched (a necessity if I forced to shooting 4:3 for all of my images anyways) to match the 7-14 FOV... without the need to guard against purple flares.